Process for purifying 1,1-dichloro-2,2,2-trifluoroethane and 1-chloro-1,2,2,2-tetrafluoroethane

摘要

The invention relates to a novel process for purifying HCFC-123 and HCFC-124 comprising: (a) reacting a fluorination reaction product comprising HCFC-123 and HCFC-123a and/or HCFC-124 and HCFC-124a wherein at least one of said HCFC-123a or HCFC-124a is present in an amount not less than 5 weight percent relative to HCFC-123 or HCFC-124 respectively in the product with anhydrous HF in the presence of a fluorination catalyst under conditions such that the amount of HCFC-123a and/or HCFC-124a relative to HCFC-123 and/or HCFC-124 respectively in the product is reduced to less than 5 weight percent. The pure product (i.e., HCFC-123 or HCFC-124) may be used in a variety of applications including solvent, refrigerant, sterilant gas and blowing agent applications.